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trdebruin's avatar
trdebruin
Copper Contributor
Dec 05, 2019

=LINEST help

Hello everyone! I am currently trying to make an excel sheet for myself that will automatically calculate all the statistics and stuff when I enter my results. I use =LINEST to determine the slope a...
excel
Formulas and Functions
mathetes's avatar
mathetes
Silver Contributor
Dec 05, 2019
There may be a number of ways to solve your problem. Without actually seeing your sheet, we're taking a stab in relative darkness. So if what I'm going to suggest doesn't work, then I'd strongly recommend you upload a sample of your worksheet, assuming you can do so without revealing any proprietary info.

What occurs to me is that you could use as a source for your LINEST function a named range. (Insert....Name...) and have an OFFSET function that designates the size of the range. You could most simply just have two cells that indicate horizontal and vertical ranges from the anchor cell (upper left corner)....

Now, if none of that makes any sense, please upload a sample of your spreadsheet.
  • mathetes's avatar
    mathetes
    Silver Contributor
    Dec 06, 2019

    trdebruin 

     

    As predicted, there is more than one way to solve your problem. 😉

     

    I'm going to assume that between Sergei and Riny you've gotten a fully functional (and flexible) solution.

  • Riny_van_Eekelen's avatar
    Riny_van_Eekelen
    Platinum Contributor
    Dec 06, 2019

    trdebruin 

    Have a look at the attached sheet. It's your own with just a few modifications. Above the "Lijnschatting" table, I entered the text for the ranges you call for in the LINEST function. The reference will change based on the value in cell J24, which I interpreted as the number of rows to be included. The LINEST function will call for these ranges with the help of INDIRECT.

     

    See if works for you.

    • trdebruin's avatar
      trdebruin
      Copper Contributor
      Dec 12, 2019

      Riny_van_Eekelen 

      Your method seems to indeed achieve what I was trying. Could you, explain how this works?

      I've taken a look at the formulas you added and I can't make much of it, so it would be nice if you could explain it to me. This way I will be able to replicate/change it by myself 

       

      • Riny_van_Eekelen's avatar
        Riny_van_Eekelen
        Platinum Contributor
        Dec 12, 2019

        trdebruin 

        In J24 you seem to have the number of rows in your data range for your line estimate. I.e. 5 rows in B8:C13.

         

        In M23 I "calculate" the range for Y:

         

        ="C8"&":C"&8+J24

         

        It simply creates a text by combining (using the &-sing) "C8", ":C" and  8+5. This becomes "C8:C13", being the range for Y. In N23, I do something similar to create the text that references to X (B8:B13). When you add something in B14 and C14, cell J24 becomes 6 and the ranges are automatically expanded to also include row 14. Thus, C8:C14 and B8:B14.

         

        Within the LINEST function, I use INDIRECT. What this does is, look at cells M23 and N23 respectively to find the references to the ranges for Y and X. So, INDIRECT(M23) is the same as C8:C13. Hope this is clear. 

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